WO2011071698A1 - Siloxanes cycliques volatils - Google Patents

Siloxanes cycliques volatils Download PDF

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Publication number
WO2011071698A1
WO2011071698A1 PCT/US2010/057962 US2010057962W WO2011071698A1 WO 2011071698 A1 WO2011071698 A1 WO 2011071698A1 US 2010057962 W US2010057962 W US 2010057962W WO 2011071698 A1 WO2011071698 A1 WO 2011071698A1
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Prior art keywords
cyclic siloxane
silicone
cyclic
cyclic siloxanes
carbon atoms
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PCT/US2010/057962
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English (en)
Inventor
Mark David Fisher
Michael Kang-Jen Lee
Bi-Shun Zeng
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Dow Corning Corporation
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Application filed by Dow Corning Corporation filed Critical Dow Corning Corporation
Priority to KR1020127016334A priority Critical patent/KR101860085B1/ko
Priority to CN201080052384.1A priority patent/CN102666555B/zh
Priority to US13/511,038 priority patent/US8481773B2/en
Priority to JP2012541185A priority patent/JP5744046B2/ja
Priority to EP10785290.7A priority patent/EP2504345B1/fr
Publication of WO2011071698A1 publication Critical patent/WO2011071698A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
    • A61K8/585—Organosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00—Drugs for dermatological disorders
    • A61P17/10—Anti-acne agents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
    • C07C31/18—Polyhydroxylic acyclic alcohols
    • C07C31/20—Dihydroxylic alcohols
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/0834—Compounds having one or more O-Si linkage
    • C07F7/0838—Compounds with one or more Si-O-Si sequences
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages

Definitions

  • Siloxane monomers, polymers, and elastomers embrace a unique combination of properties such as excellent high temperature and weather stability, extreme low temperature flexibility, high compressibility, high electrical resistivity, low dielectric loss, high gas permeability, odorless, tasteless, nontoxic etc. Because of these unique properties, silicones are widely used in industrial and consumer product applications. Specifically,
  • octamethylcyclotetrasiloxane (D 4 ) and decamethylcyclopentasiloxane (D 5 ) offer some compelling properties to the personal care market place.
  • These cyclosiloxanes along with some other low molecular weight linear siloxanes offer superior wetting properties combined with excellent volatility profile that make them highly attractive in the delivery of a variety of personal care products ranging from antiperspirants to shampoo to skin lotions.
  • the present inventors have discovered certain cyclic siloxanes which are chemically differentiated from octamethylcyclotetrasiloxane (D 4 ) and decamethylcyclopentasiloxane (D 5 ), yet having similar physical properties.
  • the present invention provides cyclic siloxanes compounds having the structural formula
  • R is an alkyl group containing 1 to 4 carbon atoms
  • R 1 is independently hydrogen or methyl.
  • This invention further relates to a process for preparing cyclic siloxanes by reacting a chloro endblocked polydimethylsiloxane with a diol functional compound containing at least 2 carbon atoms.
  • octamethylcyclotetrasiloxane (D 4 ) and decamethylcyclopentasiloxane (D 5 ). Therefore, they are useful in a variety of personal care compositions.
  • the present disclosure relates to cyclic siloxane compounds comprising the structural formula
  • R is an alkyl group containing 1 to 4 carbon atoms, alternatively R is methyl.
  • R 1 is independently hydrogen or methyl.
  • [R 2 SiO] represents a dialkylsiloxy unit. There are at least two dialkylsiloxy units in the present cyclic siloxanes, as indicated by the subscript "a" having a value of > 2 , alternatively a may range from 2 to 8, alternatively from 2 to 6, alternatively from 2 to 4, or alternatively 2 to 3.
  • (CR X 2 ) represents an alkylene or oxyalkylene group.
  • the alkylene group contains at least two carbon atoms, as indicated by the subscript b.
  • R 1 in the formula may be a hydrogen atom or a methyl group.
  • the (CR 1 2 )b segment may be for example selected from the following alkylene groups; -CH 2 CH 2 -, -CH 2 CH 2 CH 2 - ,
  • the (CR 1 ⁇ segment is -CH(CH 3 )CH 2 CH 2 - , or -CH(CH 3 )CH 2 C(CH 3 ) 2 -, -CH 2 CH 2 -0-CH 2 CH 2 -,
  • the cyclic siloxane is 2,2,4,4,6,6, 8-heptamethyl- 1,3, 5-trioxa- 2,4-disilacyclooctane having the formula;
  • the cyclic siloxane is 2,2,4,4,6, 6, 8-heptamethyl- 1,3,5,7- tetraoxa-2,4,6-trisilacyclodecane having the formula;
  • the cyclic siloxane is 2,2,4,4,6-pentamethyl-l,3,5-trioxa-2,4- disilacyclooctane having the formula;
  • the cyclic siloxane is 1 2,2,4,4,6-pentamethyl-l,3,5-trioxa-2,4- disilacycloheptane having the formula
  • the present cyclic siloxanes may be prepared by various methods. Alternatively, the cyclic siloxanes may be prepared according to the process as described herein.
  • the present disclosure provides a process for preparing cyclic siloxanes by reacting a chloro endblocked polydialkylsiloxane, alternatively a polydimethylsiloxane, with a diol functional compound containing at least 2 carbon atoms.
  • Chloro endblocked polydimethylsiloxanes are known and may be represented by the following average formula;
  • n is typically 1 or 2. They may be prepared as illustrated below;
  • the diol functional compound containing at least two carbon atoms may be selected from those organic compounds containing at least two hydroxy functional groups.
  • the diol functional compound is a diol functional hydrocarbon containing at least 3 carbon atoms, alternatively at least 4 carbon atoms, alternatively at least 5 carbon atoms, or alternatively at least 6 carbon atoms.
  • Representative, non-limiting examples include; 1,2- propanediol, 1,3-propanediol l,3-butanediol,hexylene glycol, 1,2-butanediol, 1,4-butanediol, 2,3-butanediol, 1,2-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 2,4-pentanediol, 1,2- hexanediol, 1,5-hexanediol, 1,6-hexanediol, 2,5-hexanediol, 1,3-cyclohexanediol, 3-methyl- 1,5-pentanediol, 2,6-heptanediol, 1,2-cyclopentanediol, 2-methyl-2,3-butanediol, diethylene glycol, dipropylene glycol, 1,2 hex
  • the reaction between the chloro endblocked polydimethylsiloxane and the diol functional compound may be neat or in a solvent. Typically, the reaction is conducted in a solvent, where the solvent is selected from an aprotic polar organic solvent.
  • Exemplary aprotic organic solvents include low molecular weight organic esters such as methyl acetate, ethyl acetate, ethyl propionate, isopropyl acetate, propyl acetate, ethyl fluoroacetate, butyl acetate, propyl propionate, ethyl butyrate, isobutyl acetate, ethyl isobutyrate, sec-butyl acetate, and other solvents such as tetrahydrofuran, acetone, methylisobutyl ketone, 2- methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran, 2-butoxyethyl acetate.
  • organic esters such as methyl acetate, ethyl acetate, ethyl propionate, isopropyl acetate, propyl acetate, ethyl fluoroacetate, butyl acetate,
  • the reaction between the chloro endblocked polydimethylsiloxane and the diol functional compound is typically enhanced by the addition of an organic amine compound.
  • the added amine reacts with hydrogen chloride ion formed in the reaction to form an amine salt, which may be filtered or easily separated from the cyclic siloxane product.
  • exemplary amines include; hexyl amine, pyridine, diethylamine, diethylmethylamine,
  • ethylisopropylamine dipropylamine, ethylbutylamine, diisopropylamine, dibutylamine, trimethylamine, triethylamine, ⁇ , ⁇ -dimethylbutylamine, n-methyldipropylamine,
  • the order of addition in the reaction may vary, but typically the chloro endblocked polydimethylsiloxane and diol functional compound are added simultaneously to the reaction solvent medium. Typically, the rates of each are adjusted to be approximately the same, and both are added at such a rate so as the addition was completed in about 1 hour.
  • the reaction is conducted at a temperature of 0 to 200 °C, alternatively from 30 to
  • the amounts of the chloro endblocked polydimethylsiloxane and diol functional compound used in the reaction may vary, but typically the reaction is conducted at approximately a 1 : 1 mole ratio of each reactant. Alternatively, the reaction is conducted with a slight excess, such as a 10% molar excess, of the diol compound, to ensure complete consumption of the chloro endblocked polydimethylsiloxane.
  • the cyclic siloxane may be isolated and/or purified by using common distillation techniques.
  • the chloro group may be replaced with other groups that react in a condensation reaction.
  • groups include acetoxy, oxime, silanol, and silazane groups.
  • the cyclic siloxanes of the present disclosure may be prepared by a condensation reaction, as illustrated below.
  • the cyclic siloxanes may be combined with other silicone compositions.
  • silicones include; silicone fluids, gums, resins, elastomers, silicone surfactants and emulsifiers such as silicone polyethers, organofunctional silicones such as
  • Alkylmethylsiloxanes may be combined with the present cyclic siloxanes.
  • the alkylmethylsiloxanes siloxane polymers generally will have the formula
  • Silicone gums may be combined with the present cyclic siloxanes.
  • silicone gums refer to polydiorganosiloxane gums. Silicone gums are known in the art and are available commercially. They consist of generally insoluble polydiorganosiloxanes having a viscosity in excess of 1,000,000 centistoke (mm3 ⁇ 4) at 25 °C, alternatively greater than 5,000,000 centistoke (mm3 ⁇ 4) at 25 °C. These silicone gums are typically sold as compositions already dispersed in a suitable solvent to facilitate their handling. Ultra-high viscosity silicones can also be included as optional ingredients. These ultra-high viscosity silicones typically have a kinematic viscosity greater than 5 million centistoke (mm3 ⁇ 4) at 25
  • Silicone resins may be combined with the present cyclic siloxanes. These resin compositions are generally highly crosslinked polymeric siloxanes. Crosslinking is obtained by incorporating trifunctional and/or tetrafunctional silanes with the monofunctional silane and/or difunctional silane monomers used during manufacture. The degree of crosslinking required to obtain a suitable silicone resin will vary according to the specifics of the silane monomer units incorporated during manufacture of the silicone resin. In general, any silicone having a sufficient level of trifunctional and tetrafunctional siloxane monomer units, and hence possessing sufficient levels of crosslinking to dry down to a rigid or a hard film can be considered to be suitable for use as the silicone resin.
  • silicone resins suitable for applications herein are generally supplied in an unhardened form in low viscosity volatile or nonvolatile silicone fluids.
  • the silicone resins should be incorporated into compositions of the invention in their non-hardened forms rather than as hardened resinous structures.
  • Silicone polyethers are also known as polyalkylene oxide silicone copolymers, silicone poly(oxyalkylene) copolymers, silicone glycol copolymers, or silicone surfactants. These can be linear rake or graft type materials, or ABA type where the B is the siloxane polymer block, and the A is the poly(oxyalkylene) group.
  • the poly(oxyalkylene) group can consist of polyethylene oxide, polypropylene oxide, or mixed polyethylene oxide/polypropylene oxide groups. Other oxides, such as butylene oxide or phenylene oxide are also possible.
  • the present cyclic siloxanes may be incorporated into the oil phase of o/w , w/o, w/s, or multiple phase emulsions using organic or silicone emulsifiers.
  • oil phase of o/w , w/o, w/s, or multiple phase emulsions using organic or silicone emulsifiers.
  • emulsifier refers to any compound or substance that enables the formation of an emulsion.
  • the emulsifier may be selected from any ionic, nonionic, or zwitterionic surfactant capable of stabilizing emulsions.
  • the surfactant may be an anionic surfactant, cationic surfactant, nonionic surfactant, amphoteric surfactant, or a mixture of surfactants.
  • Suitable anionic surfactants include alkali metal soaps of higher fatty acids, alkylaryl sulphonates such as sodium dodecyl benzene sulphonate, long chain fatty alcohol sulphates, olefin sulphates and olefin sulphonates, sulphated
  • sulphated esters sulphonated ethoxylated alcohols
  • sulphosuccinates alkane sulphonates
  • phosphate esters alkyl isethionates
  • alkyl taurates alkyl sarcosinates.
  • a preferred anionic surfactant is sold commercially under the name Bio-Soft N- 300. It is a triethanolamine linear alkylate sulphonate composition marketed by the Stephan Company, Northfield, Illinois.
  • Suitable cationic surfactants include alkylamine salts, quaternary ammonium salts, sulphonium salts, and phosphonium salts.
  • suitable nonionic surfactants include condensates of ethylene oxide with long chain fatty alcohols or fatty acids such as a C ⁇ A6 alcohol, condensates of ethylene oxide with an amine or an amide, condensation products of ethylene and propylene oxide, esters of glycerol, sucrose, sorbitol, fatty acid alkylol amides, sucrose esters, fluoro-surfactants, and fatty amine oxides.
  • suitable amphoteric surfactants include imidazoline compounds, alkylaminoacid salts, and betaines.
  • nonionic surfactants include polyoxyethylene fatty alcohols sold under the tradename BRIJ by Uniqema (ICI Surfactants), Wilmington, Delaware. Some examples are BRIJ 35 Liquid, an ethoxylated alcohol known as polyoxyethylene (23) lauryl ether, and BRIJ 30, another ethoxylated alcohol known as polyoxyethylene (4) lauryl ether. Some additional nonionic surfactants include ethoxylated alcohols sold under the trademark TERGITOL® by The Dow Chemical Company, Midland, Michigan.
  • TERGITOL® TMN-6 an ethoxylated alcohol known as ethoxylated trimethylnonanol
  • various of the ethoxylated alcohols i.e., Ci 2"Ci 4 secondary alcohol ethoxylates, sold under the trademarks TERGITOL® 15-S-5, TERGITOL® 15-S- 12, TERGITOL® 15-S- 15, and TERGITOL® 15-S-40.
  • one nonionic surfactant should have a low Hydrophile-Lipophile Balance (HLB) and the other nonionic surfactant should have a high HLB, such that the two nonionic surfactants have a combined HLB of 11 -15, alternatively a combined HLB of 12.5-14.5.
  • HLB Hydrophile-Lipophile Balance
  • the emulsifier may also be chosen to from a water/oil or a water/silicone emulsifier, such as silicone polyether emulsifers.
  • Silicone polyethers generally refer to silicones containing polyether or polyoxyalkylene groups, which could take in many different structural forms.
  • Such forms are either rake-type or ABA type SPEs which are derived most commonly from hydrosilylation of SiH functional organosiloxanes with allyloxy-functional polyethers in the presence of a Pt catalyst
  • the silicone polyethers disclosed in US 4,122,029 may be selected as the emulsifier for its teaching of polydiorganosiloxanepolyoxyalkylene block copolymers containing at least one polydiorganosiloxane block and at least one polyoxyalkylene block.
  • the silicone polyethers disclosed in US 4,853,474 may be selected as the emulsifier for its teaching of organopolysiloxane-polyoxyalkylene emulsifiers for polar in nonpolar liquid emulsions wherein the organopolysiloxane-polyoxyalkylene polymer molecules are intentionally cross linked through a cross linking agent joined thereto by non-hydrolyzable bonds and being free of internal hydrolyzable bonds.
  • Silicone polyether elastomers such as those disclosed in US 5811487 may be selected as the emulsifier for its teaching of elastomeric silicone polyethers useful as emulsifiers.
  • the emulsifier may also be a combination or mixture of various emulsifiers, for example any of those described above.
  • the emulsifier may also include the addition of auxiliary surfactants.
  • the emulsifier or mixture of emulsifiers may be used neat, or the emulsifier may be dissolved in a hydrophobic solvent, such as a volatile silicone, including the present cyclic siloxanes.
  • Illustrative, non-limiting commercial products suitable as the emulsifiers include; DC5225C, DC3225C, DC5200, DC9011, DC9040, DC9050 DC8822A, (Dow Corning Corp.,
  • additives can also be incorporated in the emulsion, such as fillers, foam control agents; anti-freeze agents and biocides.
  • the emulsion contains a buffering agent, such as citric acid.
  • the cyclic siloxanes, or compositions containing the present cyclic siloxanes such as the aforementioned silicone compositions can be used in various over-the-counter (OTC) personal care products, medical care, and household care products.
  • OTC over-the-counter
  • they can be used in antiperspirants, deodorants, skin creams, skin care lotions, moisturizers, facial treatments such as acne or wrinkle removers, personal and facial cleansers, bath oils, perfumes, colognes, sachets, sunscreens, pre-shave and after-shave lotions, liquid soaps, shower gels, shaving soaps, shaving lathers, hair shampoos, hair conditioners, hair sprays, mousses, permanents, depilatories, cuticle coats, make-ups, color cosmetics, foundations, blushes, lipsticks, lip balms, eyeliners, mascaras, oil removers, color cosmetic removers, and powders.
  • cyclic siloxanes cyclic siloxane of the present invention can be combined with various other components to prepare the personal care products. These components include additional surfactants, moisturizers, pigments, sunscreens, fragrances, emollients, commonly used to formulate such personal care products.
  • the cyclic siloxane compositions of the present invention can also be used in sprayable lotions formulations and in various wipe formulations.
  • Table I summarizes the cyclic siloxanes prepared.
  • Example 2 and Example 3 cyclics were analyzed using the Setaflash closed cup method. Refractive indices were determined by using the Bausch & Lomb Refractometer. An Anton Paar DMA 48 Densimeter was used to measure the densities of the samples. The viscosities were measured using a size #75 Cannon-Manning semi-micro viscometer. Atmospheric boiling points at 739 mmHg were measured using a crude boiling point method, in which boiling points were visually observed by heating 1-ml samples in small Pyrex test tubes. Physical properties of D5, isohexadecane, isododecane, and isodecyl neopentanoate were taken from literature values.
  • Example 2 and Example 3 were determined by a panel, which was asked to rate it into one of the four following categories: no smell, faint, mild, and strong.
  • Physical properties of Example 2 and Example 3 along with D5 and some organic solvents are listed in Tables II and III. Table II: Boiling Point, Flashing Point, and Surface Tension of Volatile Cyclic Siloxanes
  • Volatility was studied by placing 0.1 g of sample into an aluminum cup inside a temperature and humidity controlled climatic room (temperature set at 20 °C ⁇ 1 and humidity set at 50% ⁇ 5). The volatility was evaluated by taking weight loss measurements at predetermined time intervals for 6 hours.
  • Example 2 and Example3 cyclic siloxanes was found to be compatible with many solvents commonly used in various Life Science applications. Each solvent was tested at three different concentrations at 10%, 50% and 90%. A clear sample (C) indicates that the material is soluble in the solvent in all three solvent loadings. An insoluble sample (I) indicates that the material is insoluble in all three solvent loadings. Example 3 is only partially soluble in castor oil.
  • Example 2 or Example 3 cyclics 29.82 g
  • 8.946 g of Dow Corning® 5329 Performance Modifier a silicone polyether functional emulsifier
  • the contents of the container were blended via SpeedMixer DAC 150 FVZ for 1 minute.
  • DI H 2 0 60.137 g was premixed with NaHC0 3 (0.200 g) and added to the oil/surfactant mixture in 5-g increments followed by 1 minute of mixing until entire quantity of dilution water was added to yield a coarse emulsion. These emulsion particles were then passed through a
  • microfluidizer under conditions favorable to afford particle size 0.1-0.2 um.
  • the emulsion Upon heat aging the emulsified Example 2 for 4 weeks at 40 °C, the emulsion remained homogeneous.
  • the emulsion Upon heat aging the emulsified Example 3 for 6 weeks at 40 °C, the emulsion remained
  • Example 2 and D 5 were both formulated into emulsions with the following ingredients: Dow Corning® 5200 Formulation Aid, citric acid buffer solution, NaCl, and glycerol. Emulsions were heat aged in a 45 °C oven for 1 month or subjected to 5 cycles of the freeze/thaw process (each cycle consisted of holding at -15 °C for 18 hours followed by 25 °C for 6 hours). Table VIII: Emulsion Formulation
  • Example 2 and D5 were intact post extraction from the heat age or freeze/thaw treated emulsions, demonstrating Example 2's similarity to D5 with respect to stability in a standard Life Science formulation.
  • Example 2 and Example 3 cyclics When blended with polydimethylsiloxane gum (Dow Corning SGM-36), Example 2 and Example 3 cyclics demonstrated smaller changes in viscosity relative to solvents such as 3 cSt DC 200 fluid and organic solvents such as IHD.
  • a typical gum blend was prepared by blending 2.01 g of the high molecular weight polydimethylsiloxane (Dow Corning SGM-36) with 8.01 g of Example 2 or Example 3 in a dental mixer until smooth. Viscosity measured by using a Brookfield cone-plate Rheometer (Model DV-III) at 25 °C.
  • Cone-Plate Rheometer had a cone-plate measugin 25 mm in diameter (CP-52) and was typically run at 10-50 RPM to obtain torque reading between 10-90% Sensory Test Results

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Abstract

La présente invention concerne des composés siloxane cycliques comprenant la formule structurale dans laquelle a ≥ 2 et b ≥ 2, R est un groupe alkyle contenant 1 à 4 atomes de carbone, R1 est indépendamment un hydrogène ou un méthyle, des compositions comprenant l'un quelconque des siloxanes cycliques ci-dessus et une silicone additionnelle, des compositions d'émulsion comprenant l'un quelconque des siloxanes cycliques ci-dessus ou la composition ci-dessus, et un procédé pour préparer les composés siloxane cycliques comprenant la réaction d'un polydiméthylsiloxane à blocage terminal par chloro avec un composé diol fonctionnel contenant au moins 3 atomes de carbone.
PCT/US2010/057962 2009-11-25 2010-11-24 Siloxanes cycliques volatils WO2011071698A1 (fr)

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KR1020127016334A KR101860085B1 (ko) 2009-11-25 2010-11-24 휘발성 고리형 실록산
CN201080052384.1A CN102666555B (zh) 2009-11-25 2010-11-24 挥发性环状硅氧烷
US13/511,038 US8481773B2 (en) 2009-11-25 2010-11-24 Volatile cyclic siloxanes
JP2012541185A JP5744046B2 (ja) 2009-11-25 2010-11-24 揮発性環状シロキサン
EP10785290.7A EP2504345B1 (fr) 2009-11-25 2010-11-24 Siloxanes cycliques volatils

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US20130287959A1 (en) * 2012-04-27 2013-10-31 Chris Fish High performance silicon based coating compositions
US9505949B2 (en) 2013-10-04 2016-11-29 Burning Bush Group, Llc High performance silicon-based compositions
US9567488B2 (en) 2012-07-03 2017-02-14 Burning Bush Group, Llc High performance silicon based coating compositions
US10138381B2 (en) 2012-05-10 2018-11-27 Burning Bush Group, Llc High performance silicon based thermal coating compositions

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WO2020210988A1 (fr) * 2019-04-16 2020-10-22 Dow Global Technologies Llc Composition additive de gel-dégel

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